Apparatus for coating electric wires.



0. C. SPURLING.

APPARATUS POR GOATING ELECTRIC WIRES.

APPLI-OATION FILED SEPT. 27, 1907.

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APPLIQATION FILED SEPT. 27,1907.

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UNITED sTATEs PATENT oEErcE.

OLIVER C. SPURLING, OF CHICAGO, ILLINOIS, vASSIGrNOR TO WESTERN ELECTRIC COMPANY, OF CHICAGO, ILLINOIS, A. CORPORATION OF ILLINOIS.

APPARATUS FOR COATING- ELECTRIC WIRES.

Specification of Letters Patent. Patented Aug. 23, 1910.

' Application filed. September 27, 1907. Serial No. 394,800.

To all lwhom it may concern:

Be it known that I, OLIVER C. SPURLING, citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and vuseful Improvement in Apparatus for Coating Electric Vires, of which the following is a full, clear, concise, and eXact description.

This invention relates to enameling machines, with particular reference to machines for applying a coat of insulating enamel to wire, and its object is to provide improved means for disposing of the fumes from the furnace in which the enamel is baked, in such a manner as to increase the draft -and more especially to prevent accumulations of the solid and highly inammable deposit from t-he fumes upon the discharge pipe, and the consequent danger of fire therefrom.

In accordance with the present invention, the discharge pipe which carries away the fumes from the furnace chamber is arranged to extend downwardly, and means are provided for irrigating the interior of the discharge pipe, as by a spray of water, near ythe lpoint of entrance of the fumes, said pipe being arranged to communicate with a drainiv carrying away the Water and sediment, and

also to exhaust the cooled vapors in the air. The spray of water on the heated vapors tends to condense a part of them and thereby to create a strong draft, and also to keep the discharge pipe clean and free from accumulations of solid matter which the fumes would otherwise deposit.

My invention will be described in detail by reference to the accompanying drawings, and the part-s, improvements and combinations which I regard as novel will be pointed out in the appended claims'.

Figure l is a view in sectional elevation of the upper art of a coating machine constructed andequipped in accordance with my invention; Fig. 2 is a vertical sectional view of the lower portion of said machine; and Fig. 3 is a diagram illustrating two of such machines, with their discharge pipes connected to a common drain pipe, which discharges the fumes into a chimney or stack, and discharges the water and sediment into a sewer.

The same reference characters indicate the same parts Wherever they are shown.

In an application of George Gustave, Serial No. 388,638, filed August 15, 1907, is

disclosed a novel type of wire insulating machine in which the baking furnace is of annular form, and the wire-carrying and coating apparatus is arranged around the circumference of the furnace. The drawings of the above-mentioned application illustrate such a machine asa partof the combination of this invention. The furnace is in the form of an upright cylinder having an annular furnace chamber 22, and a central discharge pipe 23 leading out of the bottom. A chamber 24 is provided at the top of the furnace, affording communication between the annular furnace chamber and the mouth of the discharge pipe for the heated vapors. The wire to be coated is drawn from spools 25, which may be mounted at intervals around the exterior of the cylindrical furnace, as shown most clearly in Fig. 2. Each wire 26 is led from its spool 25 through guide rollers 27 onto the coating sheave 28, and after passing around said sheave is led upward through the annular furnace chamber to a sheave 29 at the top of the furnace. Each of the sheaves 28 and 29 is provided with a number of grooves so that the wire may be passed around said sheaves and through the furnace as many times as may be desired. The lower sheave 28 dips into the liquid enamel contained in the annular coating trough 39, so that the `wire receives its coating of enamel before being passed through the furnace. After the last coating of enamel has been applied and baked upon the wires, saidwires are led out through the top of the furnace over guide pulleys 30 and 3l and from thence to a suitable reeling machine upon the spools of which it is wound up. The furnace chamber is a narrow annular space 22 between concentric cylinders, and is heated by means of cast-iron grids 35, through which an electric current of suitable strength is passed, these grids being mounted close together at intervals along the inner walls of the furnace chamber.

The furnace is supported upon a pedestal base 48, the discharge pipe 23 extending down through the center of said base., The upper end of said discharge pipe 23 is in communication with the upper end of the furnace chamber from which the vapors are.

discharged, through an upper chamber 24. This chamber 24 is formed by an end plate or roof 45 supported at a distance above the end plate 43, which fits over the end of the concentric furnace cylinders, the space between the plates 43 and 45 being inclosed by a cylindrical shell 46 forming the side walls of said chamber 24. A water pipe 101 is led downward through the roof 45 of the machine and is fitted with a nozzle 102 which is arranged to deliver a spray of water within the upper end of the discharge pipe 23, as indicated in Fig. 1. The flow of water may be controlled by a valve 103. A cylindrical baffle plate 104 is preferably provided immediately surrounding the nozzle 102, to increase the efficiency of the spray.

A number of machines'such as above described can be assembled as shown in Fig. 3. The irrigating pipes 101 at the various machines can be connected to a common water main 108 and the discharge pipe 23 carrying away the fumes and water from the machines may be connected to a general drain pipe 105. The pipe 105 leads to the base of a stack 106 which exhausts the uncondensed portion of the fumes into the open air, while the water and sediment may be drained off at the base of the stack through a pipe 107 which leads to the sewer.

In wire coating machines heretofore employed in which the fumes are exhausted from the baking furnace by means of an exhaust fan, a sticky deposit of highly inflammable solid matter accumulates in the discharge pipes and passages, and unless removed, the danger of fire is great. It will be appreciated that by my invention an increased draft is provided in the discharge passages; these passages are kept clean and free from accumulation; the danger of fire is wholly avoided; and the fumes discharged by the stack into the open air, being first washed, are free from much of the objectionable solid matter which would otherwise make them a great nuisance.

It will be understood that my invention is capable of application to enameling machines of different character from the one specifically shown and described in the drawings, and various modifications may readily be made without departing from the spirit of this invention.

I claim z- 1. The combination with a wire enameling machine having a coating apparatus, and an annular furnace for baking the enamel upon the wire, of a central discharge pipe arranged within said furnace and adapted to carry away the heated fumes from the furnace, and means for irrigating the interior of the discharge pipe.

2. In a wire enameling machine, the coinbination of means for coating the wire, a heating chamber for baking the coating upon the wire, a discharge pipe concentrically mounted with respect to said chamber and leading downwardly from the top thereof, and means for spraying the interior of the discharge pipe.

3. The combination with a plurality of enamel baking furnaces each having a fume chamber at the top thereof, of a discharge pipe leading downwardly within the space inclosed by each said chamber, irrigating means within each discharge pipe, a stack, a pipe common to the discharge pipes of the several furnaces leading to said stack, and a fluid outlet in the bottom of said pipe.

4. The combination with a wire enameling machine having an annular furnace chamber, and wire carrying and coating apparatus arranged around the outside of said chamber, of a central discharge pipe extending downwardly in the space inclosed by said annular furnace, said pipe communieating at its upper end with the upper discharge end of the furnace chamber, and a water pipe having a nozzle disposed centrally within said discharge pipe, and adapted to spray water radially against the inner walls of said discharge pipe.

5. The combination with an enamel baking furnace, of a fume chamber at the top thereof, a downwardly extending discharge pipe leading from said chamber, a baille plate at the point where said discharge pipe opens into said chamber, and a water spraying device adjacent the baffle plate.

6. The combination with an annular enamel baking furnace, of a fume chamber at the top of said furnace, a centrally arranged downwardly extending discharge pipe leading from said chamber, a cylindrical baffle plate at the point where said discharge pipe opens into said chamber, and a water spraying device within the baflie plate.

In witness whereof, I, hereunto subscribe my name this 23rd day of September A. D., 190

OLIVER C. SPURLING.

Witnesses:

RALPH Gr. JOHANSEN, F. L. WHITE. 

